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Outline

Outline. Pore Pressure and Fracture G radient Drilling Fluid Casing Design Cement Design Drilling Bit Economic Analysis. Area of Interest. Area of Interest. Area of Interest. Area of Interest. OGIP Surface Map. Porosity Surface Map. Porosity 3D View. Net Pay 3D View.

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Outline

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  1. Outline • Pore Pressure and Fracture Gradient • Drilling Fluid • Casing Design • Cement Design • Drilling Bit • Economic Analysis

  2. Area of Interest

  3. Area of Interest

  4. Area of Interest

  5. Area of Interest

  6. OGIP Surface Map

  7. Porosity Surface Map

  8. Porosity 3D View

  9. Net Pay 3D View

  10. Vertical Well Placement

  11. Horizontal Well Placement

  12. Future Production Estimate

  13. Fracturing Well #1

  14. Pore Pressure and Fracture Gradient • Equation used • Pff = 0.33 x [(σOB / d) + 2 x (σpore / d)] • Pore Pressure Gradient • Approximately 0.42 psi/ft • Fracture Gradient • Approximately 0.73 psi/ft

  15. Casing Design API GRADEYield StrengthMin Ultimate StrengthMin Elongation • J-55 40K (min) – 80K (max) [psi] 60K psi 29.5% [Table 7.1 from text] • Based off of the calculated yield strength: around 42,000 psi • No need for larger ultimate strength • Water Table between 500 – 2000 foot (From NE) • Conductor Casing: 50 feet • Surface Casing: 2200 feet • Intermediate Casing: 6000 feet • Production Casing: 12000 feet 50 2200 6000 12000

  16. Casing Design cont’d CasingDiameterCasingPressure • Conductor 23.125 in 20 in 35 psi • Surface 19.2 in 14 in 1100 psi • Intermediate 13.5 in 11.25 in 2460 psi • Production 9.4 in 8.4 in 4850 psi • SF = 1.7

  17. Casing Design cont’d CasingCollapse Res. • Conductor 480 psi • Surface 1875 psi • Intermediate 5500 psi • Production 10200 psi • MW = Pressure x (0.052 x TVD)

  18. Drilling Fluid CasingMud Weight • Conductor 13.4 ppg • Surface 8.76 ppg • Intermediate 7.58 ppg • Production 6.16 ppg • MW = Pressure x (0.052 x TVD)

  19. Cement Design • Type: Class C High early strength properties which allows cement to be used at high water levels. Regularly used for shallow well cementing operations through salt beds. • Density of the cement = 11.53 ppg

  20. Cement Design cont’d • Ac = ( dout2– din2) / 1029.4 (bbl/ft) • Volume = Ac (bbl/ft) * Depth (ft) CasingCement Volume • Conductor 6.5 bbl 36.498 ft3 • Surface 368.9 bbl 2071.37 ft3 • Intermediate 324.58 bbl 1822.52 ft3 • Production 207.49 bbl 1165.07 ft3 • Total cement Volume 907.47 bbl 5095.44 ft3

  21. Drilling Bit • Drilling through shale and sandstone • We will use Poly diamond crystal bit (because they are faster and tend not to break as often as other bits) • Use multi pad drilling (Will use 75% less land)

  22. Drilling • How many days to reach depth? • It will take about 14 and half days to drill to the pay zone with an average rate of penetration of 34.3 ft/hr

  23. Economical Analysis How much will it cost per day? rule-of-thumb for trip-time estimations is 1 hr/1,000 ft of a well. C= [(R=$1125)( (t=12 hrs) +(td=350hrs)+Cb$25,000]/(F=12,000ft) = $36.02/ft $29,652.35 How much will it cost total to drill? $432,331.27

  24. Thank You! Any Questions?

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